Overhead-valve-spring compressor



J. C. THOMPSON.

OVERHEAD VALVE SPRING COMPRESSOR.

APPLICATION FILED DEC,2, I920- Patented Feb. 7, 1922 2 SHEETS-SHEET 1.

J. C. THOMPSON.

OVERHEAD VALVE SPRING COMPRESSOR.

APPLICATION FILED DEC. 2, I920- Patented Feb. 7, 1922.

2 SHEETS-SHEET 2.

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UNITED; STATES PATENT Y oFFlce.

JOHN C. rnom'rsomor BosToNj MASSACHUSETTS;

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' Specification of Letters'Patent.

PatentedZFeb. 7, 19122.

Application filed December 2, 1920. Serial-No. 427,678.

To all whom it mag/concern: p

Be it known that I, J 01m C. 'THoMPsoN, a citizen of the United States, and resident of Boston, in the county of Suffolk and Statev of Massachusetts, have invented an Improvement in Overhead- Valve Spring Compressors, of which the following description, inconnection with the accompanying drawings, is a specificatiomlike letters on the drawings representing like'pa'rts.

My present invention relates to. valve spring compressors, and-more particularly tovalve spring compressors for overhead valve springs on gasoline engines and the ike.

the holding pin that retains such spring and valve stem in operatlve relation. With the valve arrangement employed in theordinaryent type of spring compressor.

With aview to obviating the objections above pointed out, I have devised the improved spring compressor which forms the subject-matter of the present application, and I am enabled, by the use of this invention, to disassemble either one valve spring assembly, a battery of such valve spring assemblies, or any intermediate number of such assemblies and can porform this operation while such assemblies are in operative position in a motor.

The principal object of my invention,

therefore, is an improved overhead valve spring compressor for gasoline motors or the like. 7

Another object is the provision of an improved device of this character'capable of simultaneously compressing a plurality of valve springs.

Other objects and novel features of the construction and arrangement of parts constituting my invention will appear as the description of the invention P gI In removin valve stems from ositionin.

e I b I I gasollne engines, 1t 1s first necessary to com-v press the valve spring in order to remove In the accompanying drawings illustrattion,

ing the preferred embodiment of my'inven- Fig. 1- is a sectional side elevation of the valve head of a gasoline motor, showing my lmproved device in position, the valve spring being compressed to allowthe spring pin to be readily removed; I 1

Fig. 2 is 'a plan view of Fig. '1; 1 Flg. 3' is a view, similar to Fig. 1, but with a spring compressor capable of acting on a. plurality of springs simultaneously.

Fig. 4 is a plan view of Fig. 3; and Fig. .5 is a detail of the construction shown in Figs. 3 and 4. V e

Referring to thedrawings, andmore particularly to Figs. 1 and'2, lOdesignatesa valve head, employed in motors having overhead valves, and provided with a'vertically extending valvetube 11, internally threaded at 12, and provided with aflvalve seat 'l'3 at the junctionof the said valve tube and valve head. An 'externally threaded valve" slide 14 screws into the threads 12 and is reduced in diameter atits upper end 15 sufficient to allow the valve spring 16 to looselyfit there-' on, the valve springseating'on the lower end of the slide 14, asshown inFig. 1. The valve slide is drilledlongitudinally to pro vide a slide bearing for the valve stem '17, 'a' valve 18 formed integral with such valve' stem, cooperating with "the valve seat-1'3." The upper end of the valve stem is provided with a transverse hole 19,- in which fits apin tially rectangular frame formed of 'a' single piece of metal preferably square in crosssection. This piece of-inetal is shaped shown in Figs. 1 and2, and has a portion 23, forming one half the handle,,the portion 24"formed at an angle to the portion '23, a portion 25' of suflicient length to extend entirely' across the valve head 10, a portion 26 at right angles to the portion 25, a portion 27 spaced apart from and lying parallel to the portion 25, a portion 28 formed at an. angle to the portion 27 and a portion 29 lying in engagement'with and parallel to the handle portion23. The portions 23 and 29, together form ahandle', and, are secured together with rivets 30, or in any other suitable manner. Each of the portions 25 and 27, adjacent the portion 26, is drilled to provide a holding means fora hook member 31, to which is suspended a chain 32, or other suitable flexible member, and to the lower end of this chain 32 is attached a hook 33,

. the free end of which is adapted to, engage the surface 34 of the valve head 10.

The manner in which this device operates will be obvious from an inspection of Figs. 1 and '2, and it will be noted that the portions 25 and "27 are spaced apart sufficiently to allow the pin 20 to pass between them, while they are sufficiently close to each other toiensurefirm engagement with the washer Referringnow to Figs. 3, 4 and 5, where the parts of the engine that aresimilar to like parts shown in Figs. 1 and 2 have been designated by the same reference numerals, I have shown myirnproved device as adapted tosoperate on a battery of valve springs simultaneously. This method ofoporation is desirable where much work of this character is done, as it obviates the necessityiof a workman performing. a multiplieity; of operations. 7 g

My improved .device consists of two paranal-1y arranged bars or rods 35 and '36, having :their ends reduced in diameter and threaded :to receive end bars 37 and 38, held in. position by nuts 39. Each ofthe end ham, as shown in Fig. 5, is provided with. a slot 40 which is slidably mounted bear v.ing members 41held in adjusted'position V by set screws 42 passing through the body of the members into the slot 40. These bearing members '41 are drilled to receive the re (laced ends of'thebars 43, thcse bars beingnonecircular and preferably square in cross- S 8Qtl0 I1. ;-Onthe rod 36 I attach a pair of hook members 44, the lower ends of which aire bent to. engage with the Surface 34 of the valve head. While I have shown two v, o-f the hook members 44, it is obvious that I may employ more, as three, four, or one for each cylinder of the :motor. 'VVith this construction, it is obvious thatl may adjust the bars 43 relatively to each other to operate on motors in which the spring washer 22 ,wiries in diameter.

While-Ihave shown and described the preferred embodiment of my invention somewhat in detail, it is to be'understood I that I may. vary :the size, shape and arrangementzogf parts constituting my improved -dethe like comprising a handle, a pair of parallelly arranged members attached to sa1d handle, and spaced apart from each'other,

a member attached to said parallelly arranged members and at the. end thereof ,re-

mote from the handle, and'a' hook attached to the free end of said member.

2. An improved overhead valve spring compressor for use with gasoline motors and the like'comprising a handle, a pair of parallelly arranged members spaced apart from each other, and formed integral with each other andwith the handle, a member attached to said parallelly arranged mem bersand at the end thereof remote from the handle, and a hook attached to the free endof saidmember.

3. Animproved overhead valve spring compressor for use with gasoline motors.

and the like. comprising a frame,'iincluding parallelly arranged bars, end members at tached'to said bars,.hook members attached to one of said parallelly arranged bars,.and-

means attachedto the end members, for engaging with the springiholding washers of a gasoline ,motor.

An. improved overhead valve" spring compressor foruse with gasoline motors and the like comprising a frame including parallelly arranged bars, end members, attached to the said bars, hook members attached to one of said parallelly arranged bars, and ad usta-ble means attached to the end members for engaging with the spring; holding washers of agasoline notor.

5. An improved overhead valve spring compressor for use'wifth gasolinefmotors and the like comprising a frame, including parallelly arranged bars, end members attachedv to the said bars, hook membersattached to one. of said parallelly arranged bars, a slot in each end member, a pair of bearings in each slot, and adpistable with respect to each other, a pair of bars spaced apart from and parallel to each other mounted in said,

bearings, and means for holding said bearmgs and bars in ad usted position.

In testimony whereof, I have signed name to this specification.

JOHN G. THOMPSON! 

